Prank malscii



No. 6|4,27|. Patented Nov. I5, I898.

F. MALSCH.

FEEDING DEVICE FOR SEWING MACHINES. (Application filed Nov. 26, 1897.)

(No Model.)

NITED STATES ATENT Fine.

FRANK MALSCH, OF CAMDEN, NEW JERSEY, ASSIGNOR TO THE INDUSTRIALMANUFACTURING COMPANY, OF SAME PLACE.

FEEDING DEVICE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 614,271, dated November15, 1898.

Application fil d November 26,1897. Serial No. 659,831. (No model.)

To all whom it may concern:

Be it known that I, FRANK MALSCH, a citizen of the United States,residing at Camden, in the county of Camden and State of New Jersey,have invented a new and useful Feeding Device for Sewing-Machines, ofwhich the following is a specification.

My invention relates to devices for feeding goods or fabrics under astitching-needle, and more particularly to such devices which areemployed for feeding knit or other elastic goods on a two-thread oroverseamsewingmachine. In sewing knit goods on such machines I havefound that when an ordinary feed comprising a common feed bar andpresser-foot is used the fabric is stretched at the line of sewing insuch measure as to distort the shape or edges of the fabric operatedupon. This is entirely overcome if the goods directly in front of theneedle are gath ered quicker and faster than immediately under and inrear of the needle. provide two separate presser-feet, one in front ofthe stitching-needle and the other partly surrounding the needle andextending in the rear thereof, the former pressing harder against thefeed-bar than the latter by means of adjustable springs, and afeed-barwith two sets of teeth, large or coarse teeth in the front portion underthe presser-foot having the strong tension-spring and small teeth in adifferent plane from the large teeth under the Presser-foot in rear ofthe needle.

My invention will be more fully understood taken in connection with theaccompanying drawings, forming part hereof, in which my improved feedingdevice is shown in connection with an overseam sewing-machine for whichI filed an application for a United States Patent March 13, 1897, SerialNo. 627,278, and it will be apparent to those skilled in the art towhich my invention pertains that the feeding device may also be appliedto other types of sewing-machines.

In the drawings, Figure 1 is a plan of a cloth-plate, showing the twopresser-feet and their accessory mechanism. Fig. 2 is a front View ofthe same, showing also the feed-bar. Fig. 3' is a sectional elevationshowing the feed, the two presser-feet, and also the'stitch- To this endI.

ing-needle arm; and Fig. a is a perspective view of the two presser-feetand the feedbar.

Referring now to the drawings for a further description of my invention,A is the clothplate of a machine; a, the throat-plate; B, the mainshaft; C, the needle-arm, and c the stitching-needle. On the cloth-plateA are provided two lugs a, in which a hollow shaft t is journaled.Inside this hollow shaft 1' is provided another shaft e, which projectsat each end from the hollow shaft 2'. On one end of this shaft 6 issecured a lever-arm e, carrying on its free end the presser-foot c andon the other end is attached an arm 6 A stud e is secured to a portion 6of the machine-frame, and a spring 6 surrounding the said stud, isinterposed between said arm 6 and said frame portion e to keep the saidfoot e normally pressed against the throat-plate a. The outer end of thestud e is threaded and provided with a milled nut e to adjust thepressure with which the foot 6 is to bear upon the fabric.

The hollow shaftt' is provided with an arm 2", having secured to itsfree end the presserfoot i and this arm 1" has an extension 2' by whichthe said foot 2' is brought to hear more or less on the fabric to besewed. On the cloth-plate A and. protruding the extension is attached astem 2' threaded at its upper end for a nut 2' A spring 2' is placedbetween the extension 2' and nut 2' and its tension may be increased ordecreased by the said nut 2' to impart proper pressure to the said.presser-foot i A handle 2' with a cam-shaped end bearing on thecloth-plate A is pivoted to the exten* sion 1' to lift both theresser-feet e and 15 so as to facilitate the insertion of the fabricbetween the said feet and the feed-bar f, as will be more fullydescribed.

The feed-bar f is operated in the usual or any preferred manner. In Fig.3 the feedbar is shown fastened to an eccentric-strap f, which has alongitudinal motion from the oscillating plate 19 and an up-and-down motion from the eccentric f on the main shaft B. The feed-bar f isprovided with two sets of teeth f and f. The former are small and tooact in conjunction with the presser-foot e having a light pressureimparted by its tension-spring e and the set of teeth f are coarser,extend above the teeth f as shown in Figs. 3 and l, and act inconjunction with the presser-foot 2' having a strong tensionspring i.

In the vertical motion of the feed-bar f and at its highest position thesmall teeth f project only a little above the throat-plate a, anddisappear or recede under the latter much quicker than the coarse teethf so that the feeding of fabric is continued under the presser-foot '5While that under the foot 6 is discontinued, which has the eifect thatthe fabric is gathered quicker in front of the stitching-needle than inrear thereof,by which the elastic fabric is fed in such a manner that adistortion thereof or its edge is impossible.

The presser-foot i is provided with a beveled edge 2' on the lower faceand in rear of the foot, whereas the presser-foot 6 has a correspondingbeveled edge c with the edge on top and at the front of the foot e andthese beveled edges serve a twofold purpose-first, the fabric can easilypass from under the foot to under the foot e and, secondly, when thefoot 6 is raised by means of the handle i its beveled edge i engages thebeveled edge e of the foot e and raises the same, so that the goods tobe operated upon may be inserted between the feed-bar and the saidpresser-feet i and 2 The presser-foot e is provided with the usualtongue e necessary for the formation of an overseam double-thread stitchand is extended sidewise, as at e so that a continuous chain of stitchesmay be formed if a piece of fabric has been fed through the machine, thepresser-foot 6 serving to keep such chain of stitches in order even whena new piece of fabric to be operated upon is inserted under thepresser-foot "5 so that no entangling of threads at this point ispossible.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. In a sewing-machine in combination with stitch-forming mechanism, afeeding device comprising afeed-bar having one end thereof provided witha set of coarse teeth and the other end with a set of finer-cut teeth,the latter having their apexes below the apexes of the coarser teeth, apresser-foot operating in conjunction with the set of coarse teeth, aspring for said presser-foot another presserfoot operating inconjunction with the set of finer teeth, and a spring of lesser tensionthan the aforesaid spring for the last-mentioned presser-foot,substantially as and for the purposes set forth.

2. In a sewing-machine in combination with stitch-forming mechanism, afeeding device comprising a feed-bar f having two different sets ofteeth f and f, a presser-foot 6 over one set of teeth, a presser-foot 4?over the other set of teeth, beveled edges e and i on the respectivefeet, and a handle '6", substantially as and for the purposes set forth.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FRANK MALSOH. Witnesses:

HERMANN BORMANN, SAML. S. WEAVER.

